Hello!
In Optical fibers, let ##k_1## and ##k_2## be respectively the propagation constants in core and cladding, ##\beta## the propagation costant of a mode along the direction ##z##, ##a## the radius of the fiber. Using the normalized quantities ##u=a \sqrt{k_1^2 − \beta^2}## and ##w=a...
Hello PF,
I need some guide points to help me formulate a project idea on the topic of optical fibers.
Namely, the professor suggested I should look for topics on modeling of optical fibers, analysis of different optical fibers, characteristics etc. and to work in a simulator, or perform a...
In a step-index optical fiber, considering Bessel functions of order ##\nu = 0## and no ##\phi## dependence, it is possible to obtain two separate sets of components, which generate respectively TE and TM modes. In the former case, only ##E_{\phi}##, ##H_r##, ##H_z## are involved; in the latter...
Hi,
If I understood it correctly, the coefficient of attenuation for a single optical fiber, is alpha = (10/L)*log(P(0)/P(L)). Assuming if I knew the properties of the optical fiber and the amount of optical fiber in the bundle, then the total attenuation for the bundle is approximately number...
Hello,
How do I calculate the critical bending radius of a single mode optical fibre? I'm using a polyimide coated fibre with coating diameter of 155μm. The wavelength is 1550nm.
Let me know if you have any questions.
Thank you
Hello everyone.
I have been practicing for my exam in fiber optics, and stumbled upon the following question:
We have a transmission system with 3 channels, composed of a single mode fiber and a dispersion compensation fiber. Specifications are given for each. We need to calculate the channel's...
Hi I am Ali, Liaquat.
i am doing my PhD at University of Melbourne at Department of Electrical and electronics Engineering, my majors is optics and photonics. I am currently working in optical fiber communication.
Hi everyone!
This is my first post. I hope I am posting in the right place -- if not, please let me know.
I am also hoping my question will not sound too absurd; I am no physicist, just someone who would like to use complex technology to create an art installation, and I'm having a hard time...
Hey,
we are trying to couple the light of a 75 W Xe Arc Lamp (Hamamatsu L2194) into a 800um(0,8mm) diameter fiber bundle (7 fibers). Now we have 2 plano convex lenses (25mm diameter, 30mm EFL, edmund serial #45-364), the first for collimating the second for focusing onto the fiber.
We are...
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I have a waveguide that is rectangular and multimode that I but-couple to a standard telecom SMF28 fiber. I have imaged the output of the waveguide and the fiber with a 25X microscope objective onto the chip of an IR-camera. Usually the mode overlap is calculated by cross-correlation of the...
Hi everyone,
Sorry this is probably a really dull question but I'm intrigued nonetheless. I use a microscope that has multiple visible light lasers for excitation. The incident light is fed to the microscope through optical fibers. There is a single mode and a multimode fiber. I have been...
I did an experiment on the speed of light with different length of optical fibers.
I know that the fiber has a refraction index of 1.49.
I would like to know if I need to take in account the total internal reflection of the optical fibers too.
Because when I use long fibers like for exemple...
Hi i have some questions concerning optical fibers.. I want to know how the single mode fiber works.. I know that the light in sinle mode fiber travels across the middle of the fiber.. I can't understand why if we bend a little the fiber why the light don't hit the walls of the fiber?
Thx a lot
It seems that a major concern in the fabrication of optical fibers is hydroxyl diffusion into the fibers. I understand that a high hydroxyl concentration can lead to much higher attenuation. I don't know why though.
Can someone please explain to me why the hydroxyl concentration affects...